Gates 33674 Engine Coolant Thermostat Seal - Upper

Thermostat Seal for Cooling System Service

Gates Thermostat Seal 33674 is an engine coolant thermostat seal built to sit securely around the thermostat valve and help prevent coolant leakage. It is a direct-fit sealing component for select Dodge Ram 2500 and Ram 3500 applications, with dimensions that support a precise seal at the thermostat housing.

The Gates Green Stripe Heavy-Duty Thermostat Seal line focuses on secure sealing performance for cooling system service. This thermostat seal uses a lathe cut, stepped style with a 1.994 inside diameter, 2.465 outside diameter, and .563 height for the specified application.

Key Features

• Engine coolant thermostat seal for cooling system repair
• Gates part number 33674
• Green Stripe Heavy-Duty Thermostat Seal product line
• Lathe cut, stepped style for a defined sealing profile
• Inside diameter: 1.994
• Outside diameter: 2.465
• Height: .563

Detailed Description

Gates 33674 is designed for thermostat sealing service where a secure fit around the thermostat valve is needed to control coolant leakage. The seal dimensions and stepped profile support proper seating in the thermostat assembly, helping maintain the integrity of the cooling system. This part is listed for 1994-1998 Dodge Ram 2500, upper, and 1994-1998 Dodge Ram 3500, upper. If you are searching for a thermostat seal for a 1994-1998 Dodge Ram 2500 upper thermostat seal or a 1994-1998 Dodge Ram 3500 upper thermostat seal, Gates 33674 matches those applications.

This part cross-references Airtex Fuel Pumps 1109 and Stant 27292 for the same application.

What It Helps Address

• Coolant seepage at the thermostat valve area
• Leakage from a worn or flattened thermostat seal
• Poor sealing after thermostat service
• Cooling system maintenance on Dodge Ram 2500 and Ram 3500 models
• Replacement of a damaged upper thermostat seal

Installation Notes and Tips

Confirm the thermostat housing and sealing surface are clean before installation. Match the seal dimensions and stepped profile to the thermostat assembly, and verify the upper position listed for your vehicle before reassembly. For best results, inspect the thermostat and housing for wear, corrosion, or distortion during service.

Quality Assurance

Gates manufactures this thermostat seal as part of its Green Stripe Heavy-Duty line, which is focused on secure fitment in demanding cooling system applications. Part number 33674 is specified for the listed Dodge Ram 2500 and Ram 3500 fitments.